Dredger.



WILLIAM BROWN & WALTER BROWN.

DREDGER.

APPLICATION FILED JAN. I9. 1916.

1,%0,932w Patented Se t. 25,1911 5 4 3 SHEETS-SHEET I.

I Win-TEA Bnowhl WILLIAM BROWN & WALTER BROWN. DREDGER.

. h I APPLICATION FILED JAN. I9. 1916. LMQMWD I Patented Sept. 25, 191?.

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INVENTORS.

WLLIAM BROWN W LTER BROWN ,APPLICATION FILED JAN. I9, I916.

WILLIAMLBROWN & WALTER BROWN. DREDGER.

Patented Sept. 25, 1917.

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lNvElvr'ons W: nun/n BRow/v WALTER BROWN MMMM ATTORNEY.

UN'TT TATE WILLTAIVI BROWN AND WALTER. BROWN, OF RENFREW, SCOTLAND.

DRIED GER.

Application filed January 19, 1916.

To all whom it may concern:

Be it known that we, TVILLIAM Bnown and WALTER BROWN, subjects of theKing of the United Kingdom of Great Britain and Ireland, and residing atRenfrew, Renfrewshire, Scotland, have invented a certain new and usefulImprovement in Dredgers, of which the following is. a specification.

This invention relates to suction dredgers and consists in a dredgerprovided with steering jets dependent for their water supply on a set ofpumps located at the bow in immediate proximity to the ets, with valvesoperable from the bridge of the dredger for controlling the supply tothe jets.

The invention is illustrated in the accompanying drawings in whichFigures 1 and 2 show one embodiment in plan and elevation, respectively,Figs. 3 and 4 are similar views of a further embodiment and Figs. 5 and6 represent in el vation and plan, respectively, a dredger equipped withthe improved jet system.

As shown, there is fitted in the bowof the dredger a set of pumps 1, e.9., two pumps, preferably centrifugal pumps, the inlet connections 2 ofthe pumps 1 merging into perforations in the ships hull and beingprovided with valves 3 preferably controllable from the bridge 4 asindicated conventionally in the drawings. The outlet pipes 5 connectingthe pumps 1 with the jet nozzle 6 are fitted with valves 7 controllablefrom the bridge, such valves 7 being arranged to open one at a time orone set at a time. It will be seen that the closure of one outlet valveor set of outlet valves and correspond- Specification of Letters Fatent.

Patented Sept. 25, 1917.

Serial No. 72,948.

open. It follows that, when the dredger is to be steered toward thestarboard side, it is requisite only to open, the valves on the portside.

In the embodiment shown in Figs. 1 and 2 each pump is provided with aseparate inlet pipe and an outlet pipe leading to separate nozzles,while in the embodiment illustrated in Figs. 3 to 6, the outlet branchof each pump merges into a conduit branching into the several nozzles, adiaphragm or deflector 8, in the latter instance, serving, in the eventof operation of one pump only, to prevent rush of water in the directionof the inoperative pump. The pumps 1 preferably also serve for thesupply of water jets to the hopper 9 and to the pipe 10 leading to thesuction head.

What we claim is In a dredger, in combination, nozzles located one ateach side of the bow, a pair of pumps located adjacent to said nozzles,pipe connections leading from the discharge side of each pump to bothnozzles, water supply pipes connected to the inlets of said pumps andpenetrating the bottom of the dredger hull, valves operable from thedredgcr bridge to control the supply and outlet pipes and to determinewhich nozzle will be supplied with water, and a common diaphragm forcutting off communication between either pump and said nozzles,substantially as and for the purpose set forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

WM. BROWVN. WALTER BROWN.

Witnesses:

WVALLAon CRANSTON FAIRWEATHER, I'IENRY MASON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

